Greasy Green Brittlegill Russula heterophylla (Fr.) Fr. (illustrated 55% life size) Cap 5–10cm across, almost globose at first, later flattening and with a depression; various shades of green, brown, or even ochre or yellow (var. chlora); fairly firm, smooth or with radial branching veins. Stem 30–60×10–30mm, white, browning, firm; salmon when rubbed with an iron salt (this distinguishes it from R. cyanoxantha f. peltereaui). Flesh white; taste mild. Gills slightly decurrent at first, later adnexed, very closely spaced, thin; white to very pale cream; from somewhat flexible with an oily feel to somewhat brittle. Spores 5–7×4–6µ (smallest in genus), almost globose to elliptical or pear-shaped; warts 0.2–0.6µ high, mostly isolated, occasionally two to three joined together or connected by a line. Spore print whitish (A). Cap hyphae terminations tapering or sometimes prolonged into a narrow, thick-walled hair, supporting cells rectangular or inflated; cap cystidia club-shaped, cylindrical, spindle-shaped, or tapering. Habitat with broad-leaved trees; summer to early autumn. Occasional. Edible.
